Shape B because a pentagon has 5 sides
Answer:
I am confused on what you are asking but I think the answer is y=12345x
Step-by-step explanation:
its correct
Answer:
81 900 000 000 000 is 8.19 × 10¹³
Step-by-step explanation:
Write the first number 8.
Add a decimal point after it: 8.
Now count the number of digits after 8. There are 13 digits.
So, in standard form: 81 900 000 000 000 is 8.19 × 10¹³
Answer:
Option A is correct that is 
Step-by-step explanation:
We have been given a formula 

We will put values of n in
when n=2 we get
when n=3
Therefore, Option A is correct that is 
<h2>Explanation:</h2>
Here we need to solve some expressions. Remember the following rules:

Then, from the left side:

from the right side:
